Mathematica (95, 97, or 2000)

Break out of Your Cells!
If you do complex mathematical calculations or data analysis in Excel, you know what it's like to bump up against the limitations of its computing capabilitiy. Now, Mathematica Link for Excel opens up your possibilities.

By adding Mathematica into your Excel platform, you can manipulate and visualize data and equations with over a thousand more functions and options. It's easy to send even large data sets from Excel to Mathematica for the kind of sophisticated analysis Excel can't do alone, and then to return the results right into your spreadsheet.